When I open an image file (Photoshop is my default image viewer) Photoshop launches and then loads the file. When I close the image, Photoshop quits, only to re-launch every single time I open an image. It would be nice for it to follow Mac procedure where once Photoshop is launched it remains so (without any file having to be opened) until explicitly quitted.

How could I arrange that please?

I have tried creating a Photoshop "Keeper" file, almost empty of data, and saving that to the Desktop, and running it at the beginning of a session (and I could put it into Windows' startup routine), but is there a better way?